Improvement in stamp-batteries for quartz-mills



R. I'. BRIDEWELL. Stamp-Battery for Quartz-Mills.,

No. 215,090. Patented May 6,179.

UNITED STATES PATENT OEEICE.

RICHARD F. BRIDEWELL, OF SAN FRANCISCO, CALIFORI-TIA.v

IMPROVEMENT IN STAMP-BATTERIES FOR QUAR-'l'Z-AMILLS.

Specification for/ming part of Letters Patent No. 215,090, dated May 6, 1879; application iled December 30, 1878.

To all whom it may concern:

Be it knownthat I, RICHARD FRANcIs BRIDE- WELL, of the city and county of San Francisco, in the State of California, have invented a certain new and useful invention or Improvement in Stamp-Batteries for Quartz-Mills, which invention is fully set forth and described in the following specification and accompanying drawings.

My invention has for its object to construct an improved stamp-battery for the reduction of ores, in which the friction of the various movingparts and bearings is reduced to a minimum, and much less power is required to properly operate the stamps.

It consists, first, in the means for lifting the stamp-stems during their continuous rotation with a smalljalnount of friction, and always in a perpendicular direction; second, in a means for holding the stamp-stems in line perpendicularly, and causing them to work with less amount of friction, all of which will be more fully set forth hereinafter.

In the accompanying drawings, Figure l is a front elevation of a two-stamp battery constructed in accordance with myinvention. Fig. 2 is a side elevation in longitudinal vertical section.

A A represent the frame 5 B B, the'standards, between which the stamps are situated; and C C', the horizontal, supports or crossbeams. Through these horizontals C C the stamp-stems D D play in loose bearings, and

upon them are bolted the semicircular inclined planes E E'-on`e on the upper horizontal, C, and the other on the lower one, C'. These planes are held in place by flanges, through which screws pass into the frame C C', and they partly surround the stems, being formed on the arc of a circle of which the stem is the center. Upon the stems D, in position above these inclined planes, are secured tappets F F', having friction-rollers G Cr' xed thereto, in line with the top bearing-face of the planes. Set-screws a a hold these tappets in place, and they are so set with respect to each other that the upper one, Gr, faces in one direction, while the other one, G', is placed opposed to it, the inclined planes E E' being likewise xed in contrary position. The highest end of one being in line with and over the lowest end of the other one, it will be seen that as the stem is rotated the rollers G G' will both bear against their respective inclined planes, and simultaneously act to raise the stem during its rotation.

As the rollers G Gr' are placedfopposite to each other diametrically uponthe stem, it follows that they will always act to raise the stem perpendicularly, and without throwing it out of line or causing it to work unevenly upon its bearings.

The stems D D are kept inline by means of the grooved rollers or pulleys b, secured bybearings c c to the under side of the cross-pieces. They act to hold the stems in position with a small amount of friction,'both during their rotation and their lifting and dropping movements.

Upon the stems D D are secured fixed drums or wide-faced pulleys H, to receive the belts I I, that run from the driving-pulleys J upon the shaft K. This mechanism gives the rotary'motion to the stamp-stems, and produces also by the rotation their proper lifting and dropping movements.

The bearing-rollers b b serve also to resist or counteract the tension or strain of the belts, and thus enable the tappet-rollers to work evenly and in line with their inclined planes, so that the stamp-stems shall always be lifted evenly and perpendicularly.

The inclined planes E E' may be made ef greater or less pitch, according to the height required to lift the stem, and of greater or less curve; but they are required always to be on the arc of a circle of which the stem will be the center.

It is maintained that this construction and manner of operating the battery produces a great saving of friction and in the power required to operate the stamps over the ordinary method of lifting the stamps.

Having thus fully described my invention, what I claim, and desire to-secure 'by Letters Patent, is

l. In combination with an ore-stamp stem having a continuous rotary motion imparted to it, the two stationary inclined planes E E', surrounding or concentric with the stem, and placed in positions relatively opposed to each other, and the two tappets F F', secured upon the stem in positions also opposed to each other,

and coinciding with their respective planes, whereby the rotating motion of the stampstem will cause it to be lifted and dropped in a Vertical line and allow it to work iu loose bearings, constructed and applied substantially as described and set forth.

2. In combination with an ore-stamp stem Working` in loose bearings, und having its liftin g and dropping movements produced by the stationary inclined planes, and the tappets iixed on the stem in positions diametricelly opposed to eachother, as described, the means for rotating the said stern without affecting its vertical position and movement, consisting of the hori- 

